KR20020001454A - Light on/off circuit for cadmium sulfide - Google Patents

Abstract

PURPOSE: A light flasher circuit is provided to selectively operate a photoconductive cell according to level of illumination using at least one photoconductive cell, thereby achieving security system. CONSTITUTION: A light flasher circuit comprises a first photoconductive cell drive(100) having a first photoconductive cell(CDS1) with resistance value variable with level of illumination, the first drive being driven to output signal when the resistance value reaches predetermined value. The light flasher circuit also comprises a second photoconductive cell drive(200) having a second photoconductive cell(CDS2) with resistance value variable with level of illumination, the second drive being operated together with the first drive and thus driven to output signal when the resistance value reaches predetermined value. The operating condition of the first drive is different from that of the second drive.

Description

Light on / off circuit for cadmium sulfide

The present invention relates to a light automatic flashing circuit using a photoconductive element (cadmium sulfide), and more particularly, by using one or more photoconductive elements to control the automatic flashing of light according to the degree of brightness of light by a multi-step, The present invention relates to a light flashing circuit for obtaining a security effect.

Light is an electrical appliance that is very much used in our lives. The kinds and uses thereof are fluorescent lamps that can be found in various ways in homes and businesses, and are installed so that the most easily accessible can be flickered by user demand. In addition, there are automatic lightings that are installed in an apartment corridor, entrance hall, elevator entrance, etc., and maintain a lighting state for a predetermined time only when a person is located nearby, and there are sleeping lights that are turned on at a very low brightness when sleeping. In addition, the type of light and the range of use of the light, such as a light installed in a car or the like, which repeats or continuously turns on at a predetermined cycle according to a user's selection, and maintains a lighting state, and an indoor light that is linked to the operation of the car door, are very wide.

For the flashing operation of the various lights as described above, the power source, which is the driving source of light, should be supplied. The brightness and operating state of the light are controlled according to how the power supplied to the light is controlled. Therefore, the power supplied to the light is controlled differently according to the use and type of the light.

In addition, the flashing operation of the light is manually controlled or automatically controlled according to the purpose and use of the various lights. In other words, a light flasher that can be encountered a lot around us, such as an apartment entrance or elevator entrance, such as a device that automatically blinks when a person is located nearby.

Conventionally, the light flashing circuit used for this purpose uses an infrared sensor that can sense that a person is approaching, or a proximity sensor that senses that a person is near, and controls the light blinking operation.

That is, an infrared sensor or a proximity sensor is installed at the entrance of the apartment or the entrance of the elevator, and when a signal for detecting that a person is located from the sensor is output, power is automatically supplied to the light by the signal.

In the present invention, as a kind of such a light automatic flashing circuit, a light automatic flashing circuit using a photoconductive element whose resistance value changes according to the degree of light irradiation will be described.

Accordingly, an object of the present invention is to provide a light automatic flashing circuit using a photoconductive element that can control the automatic flashing of light using the photoconductive element.

Another object of the present invention is to provide a light auto-flashing circuit using a photoconductive element that can be secured by using the at least one photoconductive element to selectively operate the photoconductive element according to the degree of darkness. have.

1 is a light automatic flashing circuit diagram using a photoconductive device according to the present invention.

Explanation of symbols on the main parts of the drawings

100,200: photoconductive device driver 300: timer

400: power supply 500: light

R1 ~ R16: Resistor C1 ~ C3: Capacitor

Q1 to Q5: Transistor TR1: Union transistor

SW1, SW2: Switch VR1 ~ VR5: Variable resistor

D1: bridge diode T1: transformer

LED1 ~ LED3: Light emitting lamp CDS1, CDS2: Photoconductive element

RY1 to RY4: Relay P1: Power input terminal

Light auto-flashing circuit using a photoconductive element according to the present invention for achieving the above object, the photoconductive element is variable resistance value in accordance with the amount of illuminance; At least one photoconductive element driving means which is driven at different points in time according to the resistance value of the photoconductive element; A light that is opened and closed by a power supply and flashes; And a light driving means for controlling power to be supplied to the light when all of the one or more photoconductive element driving means are driven.

The at least one photoconductive element driving means of the present invention is connected in series, characterized in that the photoconductive element driving means at the rear end operates using the output signal of the front end of the photoconductive element driving means as a driving source.

The at least one photoconductive element driving means of the present invention is characterized in that it is driven based on the resistance values of different photoconductive elements.

The photoconductive element driving means of the present invention comprises: voltage divider means for dividing a supply voltage to a resistance value determined by the photoconductive element and a fixed resistance; Muting means for interrupting the supply voltage while the output of the voltage dividing means reaches a predetermined value; Output means for outputting a signal when the output of the voltage dividing means reaches a predetermined value; And when the output of the voltage dividing means reaches a predetermined value, it comprises a switching means for switching to form a current path of the output means.

The photoconductive device driving means of the present invention is characterized in that the output terminal of the switching means and the input terminal of the muting means are connected to each other, and when the muting means starts operation, the switching means is switched off.

The photoconductive element driving means of the present invention further comprises a display element for indicating that it is in operation.

The present invention is characterized in that it comprises two photoconductive element driving means.

The rear end photoconductive element driving means of the present invention is characterized in that it is driven when the irradiation amount of light is smaller than the driving conditions of the front end photoconductive element driving element.

The photoconductor driving means of the front end of the present invention is operated at night, the photoconductor driving means of the rear end is characterized in that it operates at night and the darkness is cast by the shadow of the human shadow.

The light driving means of the present invention comprises a light operation time setting means for controlling the lighting of the light only for a predetermined time set.

The write operation time setting means of the present invention is characterized in that the operation time for turning on the light can be variably adjusted.

The light driving means of the present invention further comprises a voltage dividing means for dividing the voltage supplied according to the type of the light.

The present invention further comprises a voltage supply means for generating a rated voltage of a predetermined size for driving the light auto flashing circuit using the photoconductive element according to claim 1.

The voltage supply means of the present invention comprises a display element for indicating that a voltage is being supplied.

The voltage supply means of the present invention further comprises a switch for manually controlling the opening and closing of the AC power supplied from the outside.

That is, in the light auto-flashing circuit of the present invention, the first photoconductive element is controlled to be operated at night, by using two photoconductive elements whose resistance values change according to the degree of light irradiation, and the second photoconductive element Is controlled to operate only when the first photoconductive element is darker than the condition under which the first photoconductive element is operated.

Therefore, the first photoconductor is operated at night, and the second photoconductor is operated only when darker darkness such as shadow is detected. As such, when the second photoconductive element is operated, the light is controlled to be turned on for a predetermined time in association with the operations of the first and second photoconductive elements.

Therefore, the present invention is installed at the entrance of the entrance, when the intruder enters at night, the first photoconductor is driven by the darkness of the night, and the second photoconductor is driven by the shadow of the intruder, the second light As the conductive element is driven, the light is automatically driven to inform the intruder of the intruder.

In addition, the present invention is installed at a specific location of the bathroom entrance and the room, when trying to go to the bathroom at night, the first photoconductor is driven by the darkness of the night, and the second photoconductor is driven by the shadow of a person It is possible to control the light to be automatically driven at the same time the second photoconductive element is driven.

Hereinafter, a light auto flashing circuit using the photoconductive device according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a light automatic flashing circuit using a photoconductive device according to the present invention.

The light auto-flashing circuit of the present invention includes a photoconductive element (CDS1) whose resistance value is changed by the irradiation amount of light, and is driven when the resistance value of the photoconductive element is changed and reaches a specific value to output a signal. It includes a first photoconductive device driver 100.

In addition, the light auto-flashing circuit of the present invention is linked to the operation of the first photoconductive element driving unit 100, and is driven when the resistance value of the provided photoconductive element CDS2 is changed to reach a specific value and is signaled. It includes a second photoconductive device driver 200 for outputting.

At this time, the operating conditions of the first photoconductive device driver 100 and the operating conditions of the second photoconductive device driver 200 should be configured differently. That is, for the operation of the second photoconductive element driver 200, it is necessary to request a darker darkness than the amount of light irradiation (the degree of darkness) in the operating state of the first photoconductive element driver 100. For example, when a certain amount of darkness is detected at night, the first photoconductive device driver 100 is driven, and the second photoconductive device driver 200 is driven when the darkness is further detected by a shadow or the like. Set.

In addition, the light automatic flashing circuit of the present invention includes a timer 300 that operates in conjunction with the first and second photoconductive device drivers 100 and 200, and a power supply unit 400 for power supply. The timer 300 is configured to control the lighting of the light to be turned on for a predetermined time. In addition, the power supply unit 400 is configured to supply power as a driving source so that the light auto-flashing circuit of the present invention can be operated.

The following describes the connection relationship between the circuit elements included in each part of the present invention in more detail.

The first and second photoconductive element driving units 100 and 200 have the same configuration. In the first photoconductive element driver 100, a resistor R1, a variable resistor VR1, and a first photoconductive element CDS1, which operate as a voltage divider for dividing a supply voltage, are connected in series with the connection point A. FIG. When the voltage divided by the voltage divider is high during the day when the amount of light is irradiated, the resistance value of the first photoconductive element CDS1 decreases and the divided voltage becomes high. As the resistance value of (CDS1) increases, the divided voltage becomes low. The variable resistor VR1 adjusts the response time of the first photoconductive element CDS1 by adjusting the resistance value of the voltage divider.

The base terminal of the first transistor Q1 is connected to the output terminal of the voltage divider through a resistor R3. The collector terminal of the first transistor Q1 is connected to the connection point A through the resistor R4, and the emitter terminal is connected to the ground terminal G. That is, the first transistor Q1 is controlled to be turned on / off by the voltage divided by the series connected resistor R1, the variable resistor VR1, and the first photoconductive element CDS1. When the first transistor Q1 is turned on, the potential of the connection point A becomes the same potential as the ground potential G through the first transistor Q1.

In addition, the first photoconductive element driver 100 includes a second transistor Q2 configured to have an operating state opposite to that of the first transistor Q1. The base terminal of the second transistor Q2 is connected to the collector terminal of the first transistor Q1, the emitter terminal is connected to the ground terminal G, and the collector terminal is connected to the light emitting element LED1 and the relay ( It is connected to the connection point A via RY1).

That is, the second transistor Q2 is turned on by the voltage supplied through the resistor R4 when the first transistor Q1 is turned off. When the second transistor Q2 is turned on, a power passage is formed in the relay RY1 and the light emitting device LED1 through the collector terminal and the emitter terminal of the second transistor Q2, thereby driving both devices. This is done. The relay RY1 is an element connecting the output terminal of the first photoconductive device driver 100 and the input terminal of the second photoconductive device driver 200, and the light emitting device LED1 is the first photoconductive device driver 100. A display element for indicating that is driven. Accordingly, while the second transistor Q2 is driven, a signal is output from the output terminal of the first photoconductive device driver 100 and applied to the second photoconductive device driver 100.

In addition, the collector terminal of the second transistor Q2 is connected to the base terminal of the first transistor Q1 through a resistor R2. That is, when the operating state of the first transistor Q1 is switched from turn-off to turn-on when the second transistor Q2 is in the driving state, the potential of the collector terminal and the second transistor of the first transistor Q1 are changed. As the potential of the bare terminal of Q2 becomes equal, the second transistor Q2 is turned off.

The second photoconductive device driver 200 of the present invention has the same configuration and function as the first photoconductive device driver 100, and internal circuit devices thereof include a photoconductive device (CDS2) and the photoconductive device ( A resistor R5 and a variable resistor VR2 connected in series with the CDS2 are provided. In addition, a third transistor Q3 operated by a voltage divided by the resistance value, a fourth transistor Q4 having an operation state opposite to that of the third transistor Q3, and the fourth transistor Q4. And a relay RY2 for supplying power to the timer 300 at a later stage and a display element LED2 for indicating that it is in an operating state.

However, the second photoconductive element driver 200 and the first photoconductive element driver 100 of the present invention have a condition that their operation point must be different. That is, as mentioned above, the first photoconductive element driving unit 100 is operated at night and becomes a constant darkness so that the resistor R1, the first photoconductive element CDS1 and the variable resistor VR1 can be operated. The resistance value should be adjusted by However, the resistance value of the second photoconductive device driver 200 should be set to operate only after a certain darkness is applied to the second photoconductive device CDS2 even after night.

For example, when darkness due to a shadow of a person is detected at night, the second photoconductor driving unit may be formed by the resistance values determined by the second photoconductor CDS2, the resistor R5, and the variable resistor VR2. 200) to be driven. In this adjustment of the resistance value, it is possible to adjust the resistance value finally determined by differently adjusting the resistance values of the variable resistors VR1 and VR2. Or by using a photoconductive element whose resistance is changed differently depending on the degree of darkness or using the resistors R1 and R5 of different resistance values.

In addition, the timer 300 of the present invention is configured to supply power to the light 500 for a predetermined time set in conjunction with the operation of the first and second photoconductive device drivers 100 and 200.

The timer 300 includes a relay RY4 for driving the second photoconductor element driving unit 200 and simultaneously with the second photoconductive device driver 200 to supply power to the light 500. That is, the relay RY4 is driven when power is supplied to supply power to the light 500. In addition, resistors R13 and R14 are connected to the relay RY4, and the resistors R13 and R14 divide a voltage to be applied. That is, it is possible to adjust the values of the resistors R13 and R14 according to the type of the light 500 used. For example, when using 220 volt light, it is possible to use after removing the resistance.

The timer 300 includes resistors VR3 and VR4 having two different resistance values for setting the operation time of the light 500. For example, if the operating time of 1 minute is selected, the resistance VR3 is selected, and if the operating time is selected 3 minutes, the resistance VR4 is selected. It is also possible to further delay the operation time of the light 500 according to the capacity of the capacitor C3 described later.

And a switch SW2 for selecting one of the two resistors by user selection. The connection relationship between the two resistors and the switch is connected to the movable terminal of the switch SW2 through three resistors R9, R10, and R11 connected in series with the connection point A, and to the two fixed terminals of the switch. A resistor VR3 and a resistor VR4 are respectively connected.

The timer 300 includes a charging capacitor C3 connected between the other side of the resistors VR3 and VR4 and the ground terminal G. Also included is a junction transistor TR1 connected via a connection point of the resistor and capacitor C3. The transistor TR1 is a transistor having one junction portion and is composed of one emitter terminal and two base terminals. The transistor TR1 acts as a very fast threshold switch. One base terminal of the transistor TR1 is connected to the connection point between the resistor R10 and the resistor R11 through the resistor VR5, and the other base terminal is connected to the ground terminal G through the resistor R16. At the same time, it is connected to the base terminal of another transistor Q5 through a resistor R12. The emitter terminal of the transistor TR1 is connected to a connection point connecting the resistors VR3 and VR4 and the capacitor C3.

That is, when the second photoconductive device driver 200 is driven to supply voltage, electric charge is charged in the capacitor C3 through one resistor VR3 or VR4 selected by the switch SW, and the charging is performed. When the voltage becomes constant, the unite transistor TR1 conducts, and the charge charged in the capacitor C3 is discharged in a short time.

By the discharge operation, the timer 300 includes a relay RY3 and a transistor Q5 which perform control for turning off the light 500 that is already turned on. As described above, the base terminal of the transistor Q5 is connected to the base terminal of one side of the unitary transistor TR1. The emitter terminal of the transistor Q5 is connected to the ground terminal G, and the collector terminal is connected to the relay RY3. The other side of the relay RY3 is connected to the connection point (A). When the relay RY3 is driven, the power path supplied to the light 500 is blocked.

Therefore, in the initial state, the relay RY3 receives the power supplied from the second photoconductive element driver 200 from the relay RY4 and forms a power path so that the relay RY3 is directly supplied to the light 500. However, when the relay RY3 is driven, the relay RY3 serves to block the power supplied from the second photoconductive element driver 200 from being supplied to the light 500.

Next, the power supply unit 400 of the present invention, the AC input terminal (P1) connected to the AC 220 volts, and the light automatic flashing circuit of the present invention from the AC input terminal (P1) according to the operation according to the user's request And a switch SW1 for opening and closing the input voltage, and a transformer T1 for transforming the input voltage to a magnitude of the rated voltage usable in the light flashing circuit of the present invention. In addition, the bridge diode D1 rectifies the rated voltage output from the transformer T1, the smoothing capacitor C1 smoothing the output of the bridge diode D1, and the output of the capacitor C1. And a display element LED3 for displaying whether the light auto-flashing circuit of the invention is operated. The voltage output from the capacitor C1 is configured to be applied to each of the driving circuit units.

The following describes the overall operation of the light automatic flashing circuit using the photoconductive device according to the present invention having the above configuration.

When the user intends to use the light flashing circuit using the photoconductive device according to the present invention, the AC input terminal P1 is connected to the AC 220 volts. Then, the switch SW1 is adjusted to the on state. When the switch SW1 is controlled to the OFF state, the driving source for the operation of the light auto flashing circuit of the present invention is cut off, and the operation cannot be performed.

AC power supplied through the switch SW1 is applied to the primary side of the transformer T1, and a predetermined voltage is induced on the secondary side by the voltage applied to the primary side of the transformer T1. In this way, the rated voltage of the magnitude | size required by the light auto-flashing circuit of this invention is produced in the secondary side of the said transformer T1. The generated rated voltage is rectified by the bridge diode D1 and converted into direct current, and the direct current is input to the first photoconductive element driver 100 through the smoothing capacitor C1. In addition, the light emitting device LED3 emits light by the voltage supplied from the smoothing capacitor C1, and the user recognizes that power is stably supplied to the light flashing circuit of the present invention.

The voltage applied to the first photoconductive device driver 100 is divided by a resistor R1, a photoconductive device CDS1, and a variable resistor VR1 connected in series. At this time, the photoconductive element CDS1 has a different resistance value depending on the irradiation amount of light applied. That is, in the case of night, it has a large resistance value by the small amount of light irradiation, and when it is low, it has a low resistance value by many light irradiation amounts.

Therefore, when a certain amount of darkness is applied, the photoconductive element CDS1 has a resistance value of a predetermined size or more, and the voltage divided by the resistor R1, the photoconductive element CDS1, and the variable resistor VR1 is very small. Value. At this time, the first transistor Q1 has an off state while the voltage does not reach the turn-on voltage of the first transistor Q1.

On the other hand, the second transistor Q2, which is configured to have an operation state opposite to that of the first transistor Q1, is switched to the turn-on state by a supply voltage applied through the resistor R4. When the second transistor Q2 is turned on, a power supply path of the relay RY1 and the light emitting device LED1 connected between the connection point A and the ground terminal G is formed. Therefore, the voltage applied to the connection point A drives the relay RY1 and is applied to the light emitting device LED1 to emit light of the light emitting device LED1. By the light emission of the light emitting device LED1, the user recognizes that the first photoconductive device driver 100 is being driven.

The voltage applied to the connection point A of the first photoconductive device driver 100 while the relay RY1 is driven is input to the second photoconductive device driver 200.

The second photoconductive device driver 200 requires darker darkness than the driving conditions of the first photoconductive device driver 100. Therefore, the first photoconductive element driving unit 100 does not operate in the darkness of the state in which the driving.

That is, according to the degree of darkness (light irradiation amount) under the condition that the first photoconductive element driver 100 is driven, the resistance R5 in the second photoconductive element driver 200, the photoconductive element CDS2, The voltage divided by the variable resistor VR2 controls the third transistor Q3 to be turned on.

When the third transistor Q3 is turned on, the connection point A and the ground terminal G are connected to each other through the third transistor Q3. At this time, the potential of the connection point A becomes the same as the ground potential, and thus the fourth transistor Q4 is maintained in the turn-off state. Since the power path of the relay RY2 is not formed in the off state of the fourth transistor Q4, the relay RY2 is turned off, and thus is connected to the rear end of the second photoconductive element driver 200. Power is not supplied to the timer 300.

However, when the darkness of the state capable of driving the second photoconductive element driver 200 is detected, the resistance R5, the photoconductive element CDS2, and the variable resistor VR2 in the second photoconductive element driver 200 are detected. The voltage divided by the voltage adjusts the third transistor Q3 to the turn-off state.

That is, when the light flasher circuit of the present invention is installed in the entrance of the apartment to monitor the intrusion of the intruder, the resistance value of the second photoconductive element CDS2 rises above a certain value by the shadow of the intruder. The voltage divided by the increased resistance value controls the third transistor Q3 to be in an off state.

In conjunction with this, the fourth transistor Q4 is controlled to be turned on. That is, the voltage supplied through the resistor R7 controls the fourth transistor Q4 to be turned on. When the fourth transistor Q4 is turned on, power is supplied to the relay RY2 and the light emitting device LED2. While the relay RY2 is driven, the supply voltage is supplied to the timer 300 at a later stage, and the light emitting device LED2 is driven by the supply voltage to emit light. The driving of the light emitting device LED2 allows the user to know that the second photoconductive device driver 200 is being driven.

In this way, when the first photoconductive device driver 100 and the second photoconductive device driver 200 are driven, the voltage supplied from the second photoconductive device driver 200 is supplied to the timer 300.

The timer 300 is provided with a relay RY4 that is directly driven by the supply voltage of the second photoconductive device driver 200 to supply power to the light 500. Accordingly, the relay RY4 operates in conjunction with driving of the second photoconductive element driver 20 to supply power to the light 500. The light 500 is driven and turned on by the applied voltage.

In this way, when the light is turned on by the multi-level light intensity monitoring in the light flashing circuit installed in the entrance or the entrance of the entrance, the user can determine that an intruder has invaded and take action accordingly.

The light 500 that is turned on by the above process is automatically turned off when a predetermined time elapses. The process is as follows.

First, the user selects the operation state of the switch SW2 in the timer 300 at the time when the light auto flashing circuit according to the present invention is operated. The switch SW2 is for setting the operation time of the light 500. In the present invention, the operation time of the light 500 is selected from two minutes, one minute and three minutes. That is, when the user selects the resistor VR3 for 1 minute, the movable terminal of the switch SW2 is in a state connected with the resistor VR3. However, when the user selects the resistor VR4 according to three minutes, the movable terminal of the switch SW2 is connected to the resistor VR4.

Therefore, when the second photoconductive device driver 200 is driven, charge is charged to the capacitor C3 through the resistor VR3 or VR4 selected by the switch SW2 to gradually increase the voltage of the capacitor C3. Incrementally, this voltage is simultaneously applied to the emitter terminal of the sustain junction transistor TR1. When the voltage charged in the capacitor C3 reaches a predetermined value, the unitary transistor TR1 is in a conductive state.

When the transistor TR1 is turned on, the charge charged in the capacitor C3 is discharged in a short time, and when the discharge end voltage of the capacitor C3 is reached, the transistor TR1 is turned off again.

As described above, when the transistor TR1 operates in the conduction state, the discharge voltage controls the transistor Q5 to be turned on. When the transistor Q5 is turned on, the relay RY3, in which the power path is opened and closed by the transistor Q5, operates. When the relay RY3 operates, the power supplied to the light 500 from the relay RY4 is cut off and the light 500 is turned off.

The photoconductor CDS1 of the first photoconductor driver 100 when time passes from night to dawn and the second photoconductor driver 200 when a shadow of a person is detected but not detected. The photoconductive element CDS2 gradually varies in resistance.

That is, when a lot of light is gradually detected in the photoconductive element CDS1 or CDS2, the resistance value gradually decreases. When the resistance value of the photoconductive element is decreased, the voltage divided by the resistor stage including the photoconductive element turns on the transistor Q1 or Q3. When the transistor Q1 or Q3 is turned on, the voltage of the collector terminal of the transistor Q1 or Q3 and the voltage of the base terminal of the transistor Q2 or Q4 become equal. In addition, since the collector terminal of the transistor Q2 or Q4 is connected to the base terminal of the transistor Q1 or Q3 through the resistor R2 or R5, the potential applied to the base terminal of the transistor Q2 or Q4. Turns off the transistor Q2 or Q4 while being higher than the potential applied to the collector terminal.

In this process, when the transistors Q2 and Q4 are turned off, the relay RY1 is driven to supply a voltage from the first photoconductive element driver 100 to the second photoconductive element driver 200, and the second optical member. The relay RY2, which was driven to supply the voltage from the conductive element driver 200 to the timer 300, is turned off, and the power supply is cut off. Therefore, when the day is a lot of light or the darkness due to the shadow of a person is stopped, the light 500 continues without the first photoconductive element driver 100 or the second photoconductive element driver 200 is driven. It will be kept off.

As described above, the light automatic flashing circuit using the photoconductive element according to the present invention uses two photoconductive elements to control the flashing of the light while the light is driven stepwise according to the irradiation amount. By the stepwise driving of the present invention, the light auto-flashing circuit is driven by one photoconductor at night, and another photoconductor is driven by the shadow of the intruder, thereby monitoring the intrusion of the intruder. have. Therefore, the present invention has the effect of building a security system in the house using a very simple light flashing circuit.

In addition, by installing the light automatic flashing circuit of the present invention where the user is needed, and controls the light to be turned on for a predetermined time set only when there is a movement of the person, to obtain an effect that is optimally available while eliminating unnecessary energy consumption. .

In addition, the present invention may be installed in the position where the light is connected in the automatic light flashing circuit, a warning alarm device, it may be controlled so that the alarm can be sounded according to the intruder.

Claims (15)

A photoconductive element whose resistance value is varied according to the illuminance of the light; At least one photoconductive element driving means which is driven at different points in time according to the resistance value of the photoconductive element; A light that is opened and closed by a power supply and flashes; And And a light driving means for controlling power to be supplied to the light when all of the one or more photoconductive element driving means are driven. The method of claim 1 wherein: The at least one photoconductive element driving means is connected in series, and the light auto-flashing using the photoconductive element, characterized in that the rear end of the photoconductive element driving means is operated using the output signal of the front photoconductive element driving means as a drive source. Circuit. The method of claim 2 wherein: And the at least one photoconductive element driving means is driven based on resistance values of different photoconductive elements. The method of claim 3 wherein: The photoconductive element driving means, Voltage dividing means for dividing a supply voltage to a resistance value determined by the photoconductive element and a fixed resistance; Muting means for interrupting the supply voltage while the output of the voltage dividing means reaches a predetermined value; Output means for outputting a signal when the output of the voltage dividing means reaches a predetermined value; And And a switching means for switching to form a current path of the output means when the output of the voltage dividing means reaches a predetermined value. The method of claim 4 wherein: The output terminal of the switching means and the input terminal of the mute means are connected to each other, And the switching means is switched off when the muting means starts operation. The method of claim 5 wherein: And the photoconductive element driving means further comprises a display element for indicating that it is in operation. 7. The method of claim 1, wherein: The photoconductive device driving means, the light automatic flashing circuit using the photoconductive device, characterized in that provided with two. The method of claim 7 wherein: And the photoconductor driving means of the rear end is driven when the light irradiation amount is smaller than the driving conditions of the photoconductor driving means of the front end. The method of claim 8 wherein: And the photoconductor driving means of the front end operates at night, and the photoconductor driving means of the rear end operates at night and when dark due to human shadow is cast. The method of claim 1 wherein: And the light driving means includes a light operation time setting means for controlling the lighting of the light only for a predetermined time set. The method of claim 10 wherein: And the light operation time setting means is capable of variably adjusting the operation time for turning on the light. The method of claim 11 wherein: The light driving means further includes a voltage dividing means for dividing the voltage supplied according to the type of the light. The method of claim 1 wherein: A light automatic flashing circuit using a photoconductive element further comprising a voltage supply means for generating a rated voltage of a predetermined size for driving the light automatic flashing circuit using the photoconductive element according to claim 1. The method of claim 13 wherein: And the voltage supply means includes a display element for indicating that voltage is being supplied. The method of claim 14 wherein: The voltage supply means is a light auto-flashing circuit using a photoconductive element further comprises a switch for manually controlling the opening and closing of the AC power supplied from the outside.